[plots] plot cktest now can handle multiple cktests

[codecov[bot]]

Codecov Report

Merging #1450 into devel will decrease coverage by <.01%. The diff coverage is 83.33%.

@@            Coverage Diff             @@
##            devel    #1450      +/-   ##
==========================================
- Coverage   91.83%   91.83%   -0.01%     
==========================================
  Files         229      229              
  Lines       26139    26159      +20     
==========================================
+ Hits        24006    24023      +17     
- Misses       2133     2136       +3

Impacted Files	Coverage Δ
pyemma/plots/markovtests.py	82.27% <83.33%> (+4.31%)	:arrow_up:
pyemma/plots/networks.py	89.37% <0%> (-0.97%)	:arrow_down:

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[thempel]

Thanks for your contribution, @melniccristina45 ! I'd like to do some minor edits but can't push to your branch. Can you tick the "allow edits from maintainers" box on the right of this conversation in github?

[cristinamelnic]

Hi Tim! It looks like it's already ticked. Let me know if I could do anything else that would help!

[thempel]

Sorry, my mistake. Thanks again!